An anti-glare, anti-fouling and impact-resistant thin film solution, its preparation method and application

Abstract

The present invention discloses an anti-glare, anti-fouling and impact-resistant thin film solution, which is prepared by the following steps: adding a dispersant and a surfactant into an ethanol aqueous solution, mixing evenly, then adding hydrophobic SiO2 aerogel powder and continuously stirring to obtain a SiO2 aerogel dispersion; then mixing with an aqueous emulsion mixture and continuously stirring, the aqueous emulsion mixture is composed of an aqueous polyurethane emulsion and a polyurea emulsion; then successively adding a film-forming aid, a wetting agent, a matting powder and an antifoaming agent and continuously stirring; finally adding a thickening agent and continuously stirring at a high speed to obtain the anti-glare, anti-fouling and impact-resistant thin film solution. The present invention also discloses its preparation method and application. The thin film solution prepared by the present invention has excellent pencil hardness, adhesion, hydrophobic and anti-fouling properties, solvent resistance and wear resistance after forming, a relatively high light transmittance and a relatively low haze, and the formed thin film solution can endow fragile substrates such as glass with excellent impact resistance and explosion resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-glare films, and particularly to an anti-glare, anti-fouling and impact-resistant film solution, a preparation method thereof and an application thereof. Background Art

[0002] Glare refers to the extreme brightness contrast in space or time caused by the uneven distribution of light, which ultimately leads to a decrease in the visibility of objects and visual fatigue. Glare is a type of light pollution, which not only causes irreparable harm to human organs, but may even directly endanger people's lives in certain situations.

[0003] Currently, with the popularization and development of digital cities, smart cities and intelligent cities, more and more transparent optical plastics such as polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), etc. have entered human life and are widely used in fields such as device displays, VR glasses, electronic billboards, etc. In the process of using these transparent optical plastics in the above fields, in addition to generating glare, they are also prone to getting stained, which affects the operability, appearance, etc. of the devices. Therefore, it is extremely necessary to develop anti-glare and anti-fouling films, and it has great economic and social benefits.

[0004] Chinese Patent CN111826061A (publication date: October 27, 2020) discloses an anti-fouling and anti-glare coating and a preparation method thereof. In this invention application, a fluorosilicon-modified acrylate polymer, a second acrylate polymer, an active diluent, anti-glare particles, a photoinitiator and a solvent are mixed in a mass ratio of 5-30:20-50:5-40:1-10:1-5:20-100 to prepare the anti-fouling and anti-glare coating. The advantages of this invention application are that the coating prepared therefrom has excellent adhesion, hardness, wear resistance and anti-pollutant adhesion effect, as well as a low haze value; the disadvantages are that the solvents used (ethyl acetate, propylene glycol methyl ether, isopropanol, acetone) are flammable organic substances and belong to carcinogens. In addition, its film-forming method is a photocuring film-forming method, which will limit the size specifications of the coated substrates.

[0005] Chinese Patent CN108298830A (published on July 20, 2018) discloses a preparation method of an antibacterial and anti-glare treatment liquid and antibacterial and anti-glare glass. In this invention application, SiO2 aerogel powder and AgNO3 alcohol solution are mainly mixed, heated, and sintered to obtain SiO2 aerogel powder filled with nano-silver particles. Then, it is mixed with an anhydrous alcohol solvent to prepare a suspension, which is further mixed and stirred with tetraethyl orthosilicate and pure water to finally obtain the antibacterial and anti-glare treatment liquid. The advantages of this invention application are that the nano-silver particles in the anti-glare treatment liquid prepared thereby avoid the aggregation effect, can be evenly dispersed in the anti-glare film layer, and have both anti-glare and long-term antibacterial functions at the same time. The disadvantages are that the possible aggregation effect of SiO2 aerogel during large-scale production is not effectively avoided, and the film-forming substance used is tetraethyl orthosilicate. As a result, the finally formed coating will have obvious defects such as poor adhesion and cracking under harsh weather conditions. Summary of the Invention

[0006] The object of the present invention is to provide an anti-glare, anti-fouling, and impact-resistant thin film solution, its preparation method and application to solve the deficiencies of the prior art.

[0007] The present invention adopts the following technical solutions:

[0008] An anti-glare, anti-fouling, and impact-resistant thin film solution, and the anti-glare, anti-fouling, and impact-resistant thin film solution is prepared by the following steps:

[0009] (1) A dispersant and a surfactant are added to an ethanol aqueous solution and mixed evenly, and then SiO2 aerogel powder is added and continuously stirred to obtain a SiO2 aerogel dispersion; wherein, the SiO2 aerogel powder is hydrophobic SiO2 aerogel powder, the dispersant is a polycarboxylate dispersant, the surfactant is an amino-functional group silane coupling agent, and the ethanol aqueous solution is composed of ethanol and water according to a mass ratio of 50 - 200:150 - 250.

[0010] (2) The SiO2 aerogel dispersion obtained in step (1) is mixed with an aqueous emulsion mixture and continuously stirred to obtain an aqueous emulsion-aerogel mixed liquid; wherein, the aqueous emulsion mixture is composed of an aqueous polyurethane emulsion and a polyurea emulsion according to a mass ratio of 150 - 200:30 - 60.

[0011] (3) A film-forming aid, a wetting agent, a matting powder, and an antifoaming agent are successively added to the aqueous emulsion-aerogel mixed liquid obtained in step (2) and continuously stirred to obtain an intermediate of the thin film solution; wherein, the film-forming aid is an alcohol ester film-forming aid, the wetting agent is a non-ionic wetting agent, the matting powder is one or more of amorphous SiO2, micro wax, polyamide powder, urea formaldehyde powder, polymethyl methacrylate microsphere powder, and polyolefin powder, and the antifoaming agent is an organosilicon antifoaming agent.

[0012] (4) After adding a thickening agent to the thin film solution intermediate obtained in step (3), continuously stir at a high speed to obtain the anti-glare, anti-fouling and impact-resistant thin film solution; wherein, the thickening agent is an aqueous thickening agent.

[0013] Among them, the addition amounts of the aqueous emulsion mixture, SiO2 aerogel powder, surfactant, matting powder, film-forming aid, defoaming agent, wetting agent, dispersant, thickening agent and ethanol aqueous solution are in the following mass ratio: 150-500: 15-30: 1-3: 3-5: 0.5-3: 0.5-2: 1-5: 1-3: 0.1-0.5: 200-450.

[0014] Further, in step (1), the stirring speed is 250 r / min to 800 r / min, and the continuous stirring time is 5 min to 30 min; in step (2), the stirring speed is 400 r / min to 500 r / min, and the continuous stirring time is 30 min to 50 min; in step (3), the stirring speed is 600 r / min to 1000 r / min, and the continuous stirring time is 90 min to 120 min; in step (4), the high-speed stirring speed is 1500 r / min to 2200 r / min, and the continuous high-speed stirring time is 30 min to 45 min.

[0015] Further, the water in step (1) is deionized water.

[0016] Further, in step (1), the particle size of the hydrophobic SiO2 aerogel powder is 1-70 μm, and in step (3), the particle size of the matting powder is 1-5 μm.

[0017] A preparation method of an anti-glare, anti-fouling and impact-resistant thin film solution is prepared by the following steps:

[0018] (1) Add a dispersant and a surfactant to an ethanol aqueous solution, mix evenly, then add SiO2 aerogel powder, and continuously stir to obtain a SiO2 aerogel dispersion; wherein, the SiO2 aerogel powder is hydrophobic SiO2 aerogel powder, the dispersant is a polycarboxylate dispersant, the surfactant is an amino-functional group silane coupling agent, and the ethanol aqueous solution is composed of ethanol and water in a mass ratio of 50-200: 150-250.

[0019] (2) Mix the SiO2 aerogel dispersion obtained in step (1) with an aqueous emulsion mixture, and continuously stir to obtain an aqueous emulsion-aerogel mixed liquid; wherein, the aqueous emulsion mixture is composed of an aqueous polyurethane emulsion and a polyurea emulsion in a mass ratio of 150-200: 30-60.

[0020] (3) Sequentially add a film-forming aid, a wetting agent, a matting agent, and an antifoaming agent to the aqueous emulsion-aerogel mixed liquid obtained in step (2), and then continuously stir to obtain an intermediate film solution; wherein, the film-forming aid is an alcohol ester film-forming aid, the wetting agent is a nonionic wetting agent, the matting agent is one or more of amorphous SiO2, micronized wax, polyamide powder, urea formaldehyde powder, polymethyl methacrylate microsphere powder, and polyolefin powder, and the antifoaming agent is a silicone antifoaming agent;

[0021] (4) Add a thickening agent to the intermediate film solution obtained in step (3), and then continuously stir at a high speed to obtain the anti-glare, anti-fouling and impact-resistant film solution; wherein, the thickening agent is an aqueous thickening agent;

[0022] Among them, the addition amounts of the aqueous emulsion mixture, SiO2 aerogel powder, surfactant, matting agent, film-forming aid, antifoaming agent, wetting agent, dispersant, thickening agent, and ethanol aqueous solution are in the following mass ratio: 150-500:15-30:1-3:3-5:0.5-3:0.5-2:1-5:1-3:0.1-0.5:200-450.

[0023] Further, in step (1), the stirring speed is 250 r / min to 800 r / min, and the continuous stirring time is 5 min to 30 min; in step (2), the stirring speed is 400 r / min to 500 r / min, and the continuous stirring time is 30 min to 50 min; in step (3), the stirring speed is 600 r / min to 1000 r / min, and the continuous stirring time is 90 min to 120 min; in step (4), the high-speed stirring speed is 1500 r / min to 2200 r / min, and the continuous high-speed stirring time is 30 min to 45 min.

[0024] Further, the water in step (1) is deionized water.

[0025] Further, in step (1), the particle size of the hydrophobic SiO2 aerogel powder is 1 to 70 μm, and in step (3), the particle size of the matting agent is 1 to 5 μm.

[0026] Application of the above anti-glare, anti-fouling and impact-resistant film solution on an optical plastic substrate or a glass substrate.

[0027] Further, the optical plastic substrate includes polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), poly-4-methyl-1-pentene (TPX), styrene-methyl methacrylate copolymer (MS), or transparent polyamide.

[0028] Advantages of the present invention:

[0029] 1. The preparation process of the thin film solution of the present invention is simple and suitable for large-scale production. Large-scale production can be achieved even in extremely harsh environments (such as working conditions below zero), and the process is green, environmentally friendly and low-cost.

[0030] 2. All raw materials used in the preparation of the thin film solution of the present invention are non-toxic, harmless, green and environmentally friendly, easy to store, without safety hazards, and will not cause any harm to the human body and the environment during the preparation process.

[0031] 3. The film-forming method of the thin film solution of the present invention is single-component self-film-forming, and there is no need to form a film under specific conditions.

[0032] 4. The thin film solution of the present invention can adopt various construction methods including soaking, spraying, etc., and generally only needs 3 - 5 minutes (naturally dried at room temperature) to form a film with mechanical properties after construction.

[0033] 5. After the thin film solution of the present invention is formed, it has excellent pencil hardness, adhesion, hydrophobic and antifouling properties, solvent resistance and wear resistance, relatively high light transmittance and low haze.

[0034] 6. After the thin film solution of the present invention is formed, it can endow fragile substrates such as glass with excellent impact resistance and explosion resistance. Specific Embodiments

[0035] The following further explains the present invention in conjunction with embodiments. The following embodiments are only used to illustrate the present invention, but do not limit the scope of implementation of the present invention.

[0036] An anti-glare, anti-fouling and impact-resistant thin film solution, and the anti-glare, anti-fouling and impact-resistant thin film solution is prepared by the following steps:

[0037] (1) Add a dispersant and a surfactant to an ethanol aqueous solution, mix evenly, then add SiO2 aerogel powder, and continuously stir at 250 r / min - 800 r / min for 5 min - 30 min to obtain a SiO2 aerogel dispersion; wherein, the SiO2 aerogel powder is hydrophobic SiO2 aerogel powder, the particle size of the hydrophobic SiO2 aerogel powder is 1 - 70 μm, the dispersant is a polycarboxylate dispersant, the surfactant is an amino-functional group silane coupling agent, the ethanol aqueous solution is composed of ethanol and water according to a mass ratio of 50 - 200:150 - 250, and the water is deionized water;

[0038] (2) Mix the SiO2 aerogel dispersion obtained in step (1) with an aqueous emulsion mixture, and continuously stir at 400 r / min - 500 r / min for 30 min - 50 min to obtain an aqueous emulsion - aerogel mixed liquid; wherein, the aqueous emulsion mixture is composed of an aqueous polyurethane emulsion and a polyurea emulsion according to a mass ratio of 150 - 200:30 - 60;

[0039] (3) Add a film-forming aid, a wetting agent, a matting powder, and an antifoaming agent to the aqueous emulsion-aerogel mixed liquid obtained in step (2) in sequence, and then stir continuously at 600 r / min to 1000 r / min for 90 min to 120 min to obtain an intermediate film solution; wherein, the film-forming aid is an alcohol ester-based film-forming aid, the wetting agent is a non-ionic wetting agent, the matting powder is one or more of amorphous SiO2, micronized wax, polyamide powder, urea formaldehyde powder, polymethyl methacrylate microsphere powder, and polyolefin powder, the particle size of the matting powder is 1 to 5 μm, and the antifoaming agent is a silicone-based antifoaming agent;

[0040] (4) Add a thickening agent to the intermediate film solution obtained in step (3) and then stir continuously at a high speed of 1500 r / min to 2200 r / min for 30 min to 45 min to obtain the anti-glare, anti-fouling and impact-resistant film solution; wherein, the thickening agent is an aqueous thickening agent;

[0041] Among them, the addition amounts of the aqueous emulsion mixture, SiO2 aerogel powder, surfactant, matting powder, film-forming aid, antifoaming agent, wetting agent, dispersant, thickening agent, and ethanol aqueous solution are in the following mass ratio: 150 to 500: 15 to 30: 1 to 3: 3 to 5: 0.5 to 3: 0.5 to 2: 1 to 5: 1 to 3: 0.1 to 0.5: 200 to 450.

[0042] The above anti-glare, anti-fouling and impact-resistant film solution is sealed and stored in a cool place. When in use, it can be directly taken out for use.

[0043] The application of the above anti-glare, anti-fouling and impact-resistant film solution on an optical plastic substrate or a glass substrate. The optical plastic substrate includes polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), poly-4-methyl-1-pentene (TPX), styrene-methyl methacrylate copolymer (MS), or transparent polyamide.

[0044] When in use, immersion construction or spraying construction can be adopted.

[0045] Immersion construction: Take the corresponding substrate and immerse it in the above anti-glare, anti-fouling and impact-resistant film solution, and leave it still for 1 - 5 min and then take it out and air-dry it naturally at room temperature. The above steps can be repeated until the required thickness is reached.

[0046] Spraying construction: Take the above anti-glare, anti-fouling and impact-resistant film solution and place it in a spray bottle, adjust the pressure to 0.1 Mpa, and spray it directly on the surface of the corresponding substrate to be sprayed. The spraying time is determined according to the required thickness.

[0047] The surfactants KH550 and KH570 involved in the following examples are KH550 and KH570 respectively from Hangzhou Jessica Chemical Co., Ltd., the dispersant SN5040 is SN-DISPERSANT 5040 from Japan San Nopco Co., Ltd., the defoamer SN1370 is SN-DEFOAMER 1370 from Japan San Nopco Co., Ltd., and the hydrophobic SiO2 aerogel powder is jios from Korea. The hydrophobic SiO2 aerogel powder (particle size ≤ 5μm) of aerogel, the aqueous polyurethane emulsion uses F0410 from Shenzhen Yoshida Chemical Co., Ltd., the polyurea emulsion uses WH200 from Foshan Wanhua Technology Co., Ltd., the alcohol ester-12 uses the alcohol ester-12 from Shenzhen Yoshida Chemical Co., Ltd., the amorphous SiO2 uses SiO2 (particle size 1.5-2μm) from Kunshan Xinkui Polymer New Materials Co., Ltd., the micropowder wax uses the polyethylene differential wax (particle size 1-2.3μm) from Qingdao Sino New Materials Co., Ltd., the wetting agent PE-100 uses PE-100 from Shenzhen Yoshida Chemical Co., Ltd., Tween-60 uses Tween-60 from Shanghai Yeyuan Biotechnology Co., Ltd., and the aqueous thickener uses J0608 from Shenzhen Yoshida Chemical Co., Ltd.

[0048] The parts after immersion and film formation in the following examples are tested for transmittance and haze according to GB / T 2410-2008 "Determination of light transmittance and haze of transparent plastics", and the adhesion is tested according to GB / T 33049-2016 "Determination of adhesion of optical thin film coatings for polarizers". The water contact angle is tested according to GB / T 30693-2014 "Measurement of contact angle between plastic film and water", and the pencil hardness is tested according to GB / T6739-2006 "Determination of paint film hardness by pencil method for paints and varnishes". The wear resistance is tested according to HG / T 4303-2012 "Determination method for abrasion resistance of surface hardened polyester film" (load 500g), the solvent resistance is tested according to GB / T 11547-2008 "Determination of resistance of plastics to liquid chemical reagents", and the impact resistance is tested according to GB / T 5137.1-2020 "Test methods for automotive safety glass Part 1: Mechanical properties test".

[0049] Example 1

[0050] The ethanol aqueous solution of this embodiment is composed of ethanol and deionized water in a mass ratio of 100:150; the aqueous emulsion mixture is composed of aqueous polyurethane emulsion and polyurea emulsion in a mass ratio of 150:60.

[0051] (1) Add 2 g of SN5040 (dispersant) and 3 g of KH570 (surfactant) to 250 g of an ethanol aqueous solution. After mixing evenly, add 30 g of hydrophobic SiO2 aerogel powder and then stir it continuously at 500 r / min for 10 min to obtain a SiO2 aerogel dispersion;

[0052] (2) Mix the SiO2 aerogel dispersion obtained in step (1) with 230 g of an aqueous emulsion mixture, and then stir it continuously at 500 r / min for 30 min to obtain an aqueous emulsion-aerogel mixed liquid;

[0053] (3) Add 2 g of alcohol ester-12 (film-forming aid), 4 g of PE-100 (wetting agent), 4 g of amorphous SiO2 (matting powder), and 0.5 g of SN1370 (defoamer) to the aqueous emulsion-aerogel mixed liquid obtained in step (2) in sequence, and then stir it continuously at 800 r / min for 90 min to obtain an intermediate film solution;

[0054] (4) Add 0.3 g of thickener J0608 to the intermediate film solution obtained in step (3), and then stir it continuously at a high speed of 1500 r / min for 30 min to obtain the anti-glare, anti-fouling and impact-resistant film solution.

[0055] Take a piece of ordinary glass (200 mm * 150 mm * 2 mm), immerse it in the anti-glare, anti-fouling and impact-resistant film solution prepared in this example, let it stand for 2 min, take it out and air-dry it naturally at room temperature to obtain a film. After testing, the properties of this part are as follows: light transmittance 98%, haze 1.5%, adhesion grade 0, water contact angle 155°, pencil hardness 6H. Immerse it in analytical pure ethanol, methyl ethyl ketone, ethyl acetate and toluene respectively for 7 d, and no film disease phenomenon is observed. Moreover, no scratches are observed on its surface after 5000 times of friction. At the same time, when this part is vertically dropped from 5 m directly above by a 227 g quenched steel ball, no cracks appear.

[0056] Example 2

[0057] The ethanol aqueous solution in this example is composed of ethanol and deionized water according to a mass ratio of 100:250; the aqueous emulsion mixture is composed of an aqueous polyurethane emulsion and a polyurea emulsion according to a mass ratio of 200:60.

[0058] (1) Add 3 g of SN5040 (dispersant) and 3 g of KH550 (surfactant) to 350 g of an ethanol aqueous solution. After mixing evenly, add 20 g of hydrophobic SiO2 aerogel powder and then stir it continuously at 650 r / min for 15 min to obtain a SiO2 aerogel dispersion;

[0059] (2) After mixing the SiO2 aerogel dispersion obtained in step (1) with 260 g of the aqueous emulsion mixture, continuously stir it at 450 r / min for 30 min to obtain an aqueous emulsion-aerogel mixed liquid;

[0060] (3) Add 1.5 g of alcohol ester-12 (film-forming aid), 4 g of Tween-60 (wetting agent), 4 g of micronized wax (matting agent), and 1 g of SN1370 (defoaming agent) to the aqueous emulsion-aerogel mixed liquid obtained in step (2) in sequence, and then continuously stir it at 720 r / min for 90 min to obtain an intermediate film solution;

[0061] (4) Add 0.5 g of thickener J0608 to the intermediate film solution obtained in step (3), and then continuously stir it at a high speed of 2000 r / min for 30 min to obtain the anti-glare, anti-fouling and impact-resistant film solution.

[0062] Take a polycarbonate (PC) plate (250 mm * 150 mm * 1.5 mm), immerse it in the anti-glare, anti-fouling and impact-resistant film solution prepared in this example, let it stand for 1 min, take it out and air-dry it at room temperature to obtain a film. After testing, the properties of this part are as follows: light transmittance 99%, haze 1%, adhesion grade 0, water contact angle 149°, pencil hardness 7H. After soaking it in analytical pure ethanol, butanone, ethyl acetate and toluene for 7 d, no film disease phenomenon is observed, and no scratch is observed on its surface after 5000 times of friction. At the same time, when this part is vertically dropped from 5 m directly above by a 227 g quenched steel ball, no crack appears.

Claims

1. An anti-glare, anti-fouling and impact-resistant thin film solution, characterized in that, The anti-glare, anti-fouling and impact-resistant thin film solution is prepared by the following steps: (1) Add a dispersant and a surfactant to an ethanol aqueous solution, mix evenly, then add SiO2 aerogel powder and continuously stir to obtain a SiO2 aerogel dispersion; wherein, the SiO2 aerogel powder is a hydrophobic SiO2 aerogel powder with a particle size of 1-70 μm, the dispersant is a polycarboxylate dispersant, the surfactant is an amino-functional silane coupling agent, and the ethanol aqueous solution is composed of ethanol and water in a mass ratio of 50-200:150-250; the stirring speed is 250 r / min-800 r / min, and the continuous stirring time is 5 min-30 min; (2) Mix the SiO2 aerogel dispersion obtained in step (1) with an aqueous emulsion mixture and continuously stir to obtain an aqueous emulsion-aerogel mixed liquid; wherein, the aqueous emulsion mixture is composed of an aqueous polyurethane emulsion and a polyurea emulsion in a mass ratio of 150-200:30-60; the stirring speed is 400 r / min-500 r / min, and the continuous stirring time is 30 min-50 min; (3) Add a film-forming aid, a wetting agent, a matting powder and an antifoaming agent to the aqueous emulsion-aerogel mixed liquid obtained in step (2) in sequence and continuously stir to obtain an intermediate of the thin film solution; wherein, the film-forming aid is an alcohol ester film-forming aid, the wetting agent is a non-ionic wetting agent, the matting powder is one or more of amorphous SiO2, micronized wax, polyamide powder, urea formaldehyde powder, polymethyl methacrylate microsphere powder and polyolefin powder, the particle size of the matting powder is 1-5 μm, and the antifoaming agent is a silicone antifoaming agent; the stirring speed is 600 r / min-1000 r / min, and the continuous stirring time is 90 min-120 min; (4) Add a thickener to the intermediate of the thin film solution obtained in step (3) and continuously stir at a high speed to obtain the anti-glare, anti-fouling and impact-resistant thin film solution; wherein, the thickener is an aqueous thickener; the high-speed stirring speed is 1500 r / min-2200 r / min, and the continuous high-speed stirring time is 30 min-45 min; Among them, the addition amounts of the aqueous emulsion mixture, SiO2 aerogel powder, surfactant, matting powder, film-forming aid, antifoaming agent, wetting agent, dispersant, thickener and ethanol aqueous solution are in the following mass ratio: 150-500:15-30:1-3:3-5:0.5-3:0.5-2:1-5:1-3:0.1-0.5:200-450.

2. The anti-glare, anti-fouling and impact-resistant thin film solution according to claim 1, wherein The water described in step (1) is deionized water.

3. A preparation method of an anti-glare, anti-fouling and impact-resistant thin film solution, characterized in that, It is prepared by the following steps: (1) Add a dispersant and a surfactant to an ethanol aqueous solution, mix them evenly, then add SiO2 aerogel powder and stir continuously to obtain a SiO2 aerogel dispersion; wherein, the SiO2 aerogel powder is hydrophobic SiO2 aerogel powder, the particle size of the hydrophobic SiO2 aerogel powder is 1 - 70 μm, the dispersant is a polycarboxylate dispersant, the surfactant is an amino-functional silane coupling agent, and the ethanol aqueous solution is composed of ethanol and water in a mass ratio of 50 - 200:150 - 250; the stirring speed is 250 r / min - 800 r / min, and the continuous stirring time is 5 min - 30 min; (2) Mix the SiO2 aerogel dispersion obtained in step (1) with an aqueous emulsion mixture and stir continuously to obtain an aqueous emulsion - aerogel mixed liquid; wherein, the aqueous emulsion mixture is composed of an aqueous polyurethane emulsion and a polyurea emulsion in a mass ratio of 150 - 200:30 - 60; the stirring speed is 400 r / min - 500 r / min, and the continuous stirring time is 30 min - 50 min; (3) Add a film-forming aid, a wetting agent, a matting powder, and an antifoaming agent to the aqueous emulsion - aerogel mixed liquid obtained in step (2) in sequence and stir continuously to obtain an intermediate film solution; wherein, the film-forming aid is an alcohol ester film-forming aid, the wetting agent is a non-ionic wetting agent, the matting powder is one or more of amorphous SiO2, micronized wax, polyamide powder, urea formaldehyde powder, polymethyl methacrylate microsphere powder, and polyolefin powder, the particle size of the matting powder is 1 - 5 μm, and the antifoaming agent is a silicone antifoaming agent; the stirring speed is 600 r / min - 1000 r / min, and the continuous stirring time is 90 min - 120 min; (4) Add a thickener to the intermediate film solution obtained in step (3) and stir continuously at a high speed to obtain the anti-glare, anti-fouling, and impact-resistant film solution; wherein, the thickener is an aqueous thickener; the high-speed stirring speed is 1500 r / min - 2200 r / min, and the continuous high-speed stirring time is 30 min - 45 min; Among them, the addition amounts of the aqueous emulsion mixture, SiO2 aerogel powder, surfactant, matting powder, film-forming aid, antifoaming agent, wetting agent, dispersant, thickener, and ethanol aqueous solution are in the following mass ratio: 150 - 500:15 - 30:1 - 3:3 - 5:0.5 - 3:0.5 - 2:1 - 5:1 - 3:0.1 - 0.5:200 - 450.

4. The method for preparing the anti-glare, anti-fouling and impact-resistant thin film solution according to claim 3, characterized in that, The water in step (1) is deionized water.

5. Application of the anti-glare, anti-fouling, and impact-resistant film solution according to any one of claims 1 - 2 on an optical plastic substrate or a glass substrate.

6. The application according to claim 5, wherein The optical plastic substrate includes polymethyl methacrylate, polycarbonate, polystyrene, poly(4-methyl-1-pentene), styrene-methyl methacrylate copolymer, or transparent polyamide.